This calculator uses a simplified educational model where brown generally dominates over green and blue, and green dominates over blue. It estimates hidden parental alleles from phenotype and then combines those probabilities to produce likely baby eye-color outcomes.
Simplified inheritance assumptions
Brown > Green > Blue (educational dominance hierarchy)
Optional grandparent colors can refine hidden-allele assumptions, which can slightly shift probabilities—especially for recessive blue outcomes.
Important limitation
Real eye color is influenced by multiple genes, not just one dominance chain. Treat the output as a fun educational estimate rather than a definitive genetic prediction.
Frequently Asked Questions
Common questions answered by our medical team
Yes, it can happen if both parents carry recessive blue alleles. In simplified models, that can produce a blue-eyed child in a minority of pairings.
